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src/java.desktop/share/native/libfreetype/src/sfnt/sfobjs.c
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@@ -1,21 +1,21 @@
-/***************************************************************************/
-/* */
-/* sfobjs.c */
-/* */
-/* SFNT object management (base). */
-/* */
-/* Copyright 1996-2018 by */
-/* David Turner, Robert Wilhelm, and Werner Lemberg. */
-/* */
-/* This file is part of the FreeType project, and may only be used, */
-/* modified, and distributed under the terms of the FreeType project */
-/* license, LICENSE.TXT. By continuing to use, modify, or distribute */
-/* this file you indicate that you have read the license and */
-/* understand and accept it fully. */
-/* */
-/***************************************************************************/
+/****************************************************************************
+ *
+ * sfobjs.c
+ *
+ * SFNT object management (base).
+ *
+ * Copyright (C) 1996-2019 by
+ * David Turner, Robert Wilhelm, and Werner Lemberg.
+ *
+ * This file is part of the FreeType project, and may only be used,
+ * modified, and distributed under the terms of the FreeType project
+ * license, LICENSE.TXT. By continuing to use, modify, or distribute
+ * this file you indicate that you have read the license and
+ * understand and accept it fully.
+ *
+ */
#include <ft2build.h>
#include "sfobjs.h"
#include "ttload.h"
@@ -39,18 +39,18 @@
#ifdef TT_CONFIG_OPTION_BDF
#include "ttbdf.h"
#endif
- /*************************************************************************/
- /* */
- /* The macro FT_COMPONENT is used in trace mode. It is an implicit */
- /* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */
- /* messages during execution. */
- /* */
+ /**************************************************************************
+ *
+ * The macro FT_COMPONENT is used in trace mode. It is an implicit
+ * parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log
+ * messages during execution.
+ */
#undef FT_COMPONENT
-#define FT_COMPONENT trace_sfobjs
+#define FT_COMPONENT sfobjs
/* convert a UTF-16 name entry to ASCII */
static FT_String*
@@ -916,11 +916,13 @@
return error;
/* Stream may have changed in sfnt_open_font. */
stream = face->root.stream;
- FT_TRACE2(( "sfnt_init_face: %08p, %d\n", face, face_instance_index ));
+ FT_TRACE2(( "sfnt_init_face: %08p (index %d)\n",
+ face,
+ face_instance_index ));
face_index = FT_ABS( face_instance_index ) & 0xFFFF;
/* value -(N+1) requests information on index N */
if ( face_instance_index < 0 )
@@ -1339,10 +1341,17 @@
/* embedded bitmap support */
if ( sfnt->load_eblc )
LOAD_( eblc );
+ /* colored glyph support */
+ if ( sfnt->load_cpal )
+ {
+ LOAD_( cpal );
+ LOAD_( colr );
+ }
+
/* consider the pclt, kerning, and gasp tables as optional */
LOAD_( pclt );
LOAD_( gasp );
LOAD_( kern );
@@ -1387,16 +1396,17 @@
{
FT_Face root = &face->root;
FT_Long flags = root->face_flags;
- /*********************************************************************/
- /* */
- /* Compute face flags. */
- /* */
+ /**********************************************************************
+ *
+ * Compute face flags.
+ */
if ( face->sbit_table_type == TT_SBIT_TABLE_TYPE_CBLC ||
- face->sbit_table_type == TT_SBIT_TABLE_TYPE_SBIX )
+ face->sbit_table_type == TT_SBIT_TABLE_TYPE_SBIX ||
+ face->colr )
flags |= FT_FACE_FLAG_COLOR; /* color glyphs */
if ( has_outline == TRUE )
flags |= FT_FACE_FLAG_SCALABLE; /* scalable outlines */
@@ -1436,14 +1446,14 @@
}
#endif
root->face_flags = flags;
- /*********************************************************************/
- /* */
- /* Compute style flags. */
- /* */
+ /**********************************************************************
+ *
+ * Compute style flags.
+ */
flags = 0;
if ( has_outline == TRUE && face->os2.version != 0xFFFFU )
{
/* We have an OS/2 table; use the `fsSelection' field. Bit 9 */
@@ -1469,18 +1479,18 @@
flags |= FT_STYLE_FLAG_ITALIC;
}
root->style_flags |= flags;
- /*********************************************************************/
- /* */
- /* Polish the charmaps. */
- /* */
- /* Try to set the charmap encoding according to the platform & */
- /* encoding ID of each charmap. Emulate Unicode charmap if one */
- /* is missing. */
- /* */
+ /**********************************************************************
+ *
+ * Polish the charmaps.
+ *
+ * Try to set the charmap encoding according to the platform &
+ * encoding ID of each charmap. Emulate Unicode charmap if one
+ * is missing.
+ */
tt_face_build_cmaps( face ); /* ignore errors */
/* set the encoding fields */
@@ -1519,11 +1529,12 @@
error = FT_CMap_New( (FT_CMap_Class)&tt_cmap_unicode_class_rec,
NULL, &cmaprec, NULL );
if ( error &&
- FT_ERR_NEQ( error, No_Unicode_Glyph_Name ) )
+ FT_ERR_NEQ( error, No_Unicode_Glyph_Name ) &&
+ FT_ERR_NEQ( error, Unimplemented_Feature ) )
goto Exit;
error = FT_Err_Ok;
#endif /* FT_CONFIG_OPTION_POSTSCRIPT_NAMES */
@@ -1613,14 +1624,14 @@
/* it has only empty glyphs then */
if ( !FT_HAS_FIXED_SIZES( root ) && !FT_IS_SCALABLE( root ) )
root->face_flags |= FT_FACE_FLAG_SCALABLE;
- /*********************************************************************/
- /* */
- /* Set up metrics. */
- /* */
+ /**********************************************************************
+ *
+ * Set up metrics.
+ */
if ( FT_IS_SCALABLE( root ) )
{
/* XXX What about if outline header is missing */
/* (e.g. sfnt wrapped bitmap)? */
root->bbox.xMin = face->header.xMin;
@@ -1628,42 +1639,57 @@
root->bbox.xMax = face->header.xMax;
root->bbox.yMax = face->header.yMax;
root->units_per_EM = face->header.Units_Per_EM;
- /* XXX: Computing the ascender/descender/height is very different */
- /* from what the specification tells you. Apparently, we */
- /* must be careful because */
- /* */
- /* - not all fonts have an OS/2 table; in this case, we take */
- /* the values in the horizontal header. However, these */
- /* values very often are not reliable. */
- /* */
- /* - otherwise, the correct typographic values are in the */
- /* sTypoAscender, sTypoDescender & sTypoLineGap fields. */
- /* */
- /* However, certain fonts have these fields set to 0. */
- /* Rather, they have usWinAscent & usWinDescent correctly */
- /* set (but with different values). */
- /* */
- /* As an example, Arial Narrow is implemented through four */
- /* files ARIALN.TTF, ARIALNI.TTF, ARIALNB.TTF & ARIALNBI.TTF */
- /* */
- /* Strangely, all fonts have the same values in their */
- /* sTypoXXX fields, except ARIALNB which sets them to 0. */
- /* */
- /* On the other hand, they all have different */
- /* usWinAscent/Descent values -- as a conclusion, the OS/2 */
- /* table cannot be used to compute the text height reliably! */
- /* */
-
- /* The ascender and descender are taken from the `hhea' table. */
- /* If zero, they are taken from the `OS/2' table. */
+ /*
+ * Computing the ascender/descender/height is tricky.
+ *
+ * The OpenType specification v1.8.3 says:
+ *
+ * [OS/2's] sTypoAscender, sTypoDescender and sTypoLineGap fields
+ * are intended to allow applications to lay out documents in a
+ * typographically-correct and portable fashion.
+ *
+ * This is somewhat at odds with the decades of backwards
+ * compatibility, operating systems and applications doing whatever
+ * they want, not to mention broken fonts.
+ *
+ * Not all fonts have an OS/2 table; in this case, we take the values
+ * in the horizontal header, although there is nothing stopping the
+ * values from being unreliable. Even with a OS/2 table, certain fonts
+ * set the sTypoAscender, sTypoDescender and sTypoLineGap fields to 0
+ * and instead correctly set usWinAscent and usWinDescent.
+ *
+ * As an example, Arial Narrow is shipped as four files ARIALN.TTF,
+ * ARIALNI.TTF, ARIALNB.TTF and ARIALNBI.TTF. Strangely, all fonts have
+ * the same values in their sTypo* fields, except ARIALNB.ttf which
+ * sets them to 0. All of them have different usWinAscent/Descent
+ * values. The OS/2 table therefore cannot be trusted for computing the
+ * text height reliably.
+ *
+ * As a compromise, do the following:
+ *
+ * 1. If the OS/2 table exists and the fsSelection bit 7 is set
+ * (USE_TYPO_METRICS), trust the font and use the sTypo* metrics.
+ * 2. Otherwise, use the `hhea' table's metrics.
+ * 3. If they are zero and the OS/2 table exists,
+ * 1. use the OS/2 table's sTypo* metrics if they are non-zero.
+ * 2. Otherwise, use the OS/2 table's usWin* metrics.
+ */
+ if ( face->os2.version != 0xFFFFU && face->os2.fsSelection & 128 )
+ {
+ root->ascender = face->os2.sTypoAscender;
+ root->descender = face->os2.sTypoDescender;
+ root->height = root->ascender - root->descender +
+ face->os2.sTypoLineGap;
+ }
+ else
+ {
root->ascender = face->horizontal.Ascender;
root->descender = face->horizontal.Descender;
-
root->height = root->ascender - root->descender +
face->horizontal.Line_Gap;
if ( !( root->ascender || root->descender ) )
{
@@ -1671,23 +1697,22 @@
{
if ( face->os2.sTypoAscender || face->os2.sTypoDescender )
{
root->ascender = face->os2.sTypoAscender;
root->descender = face->os2.sTypoDescender;
-
root->height = root->ascender - root->descender +
face->os2.sTypoLineGap;
}
else
{
root->ascender = (FT_Short)face->os2.usWinAscent;
root->descender = -(FT_Short)face->os2.usWinDescent;
-
root->height = root->ascender - root->descender;
}
}
}
+ }
root->max_advance_width =
(FT_Short)face->horizontal.advance_Width_Max;
root->max_advance_height =
(FT_Short)( face->vertical_info ? face->vertical.advance_Height_Max
@@ -1735,10 +1760,17 @@
sfnt->free_psnames( face );
/* destroy the embedded bitmaps table if it is loaded */
if ( sfnt->free_eblc )
sfnt->free_eblc( face );
+
+ /* destroy color table data if it is loaded */
+ if ( sfnt->free_cpal )
+ {
+ sfnt->free_cpal( face );
+ sfnt->free_colr( face );
+ }
}
#ifdef TT_CONFIG_OPTION_BDF
/* freeing the embedded BDF properties */
tt_face_free_bdf_props( face );
@@ -1790,15 +1822,22 @@
/* freeing sbit size table */
FT_FREE( face->root.available_sizes );
FT_FREE( face->sbit_strike_map );
face->root.num_fixed_sizes = 0;
-#ifdef TT_CONFIG_OPTION_GX_VAR_SUPPORT
FT_FREE( face->postscript_name );
+
+#ifdef TT_CONFIG_OPTION_GX_VAR_SUPPORT
FT_FREE( face->var_postscript_prefix );
#endif
+ /* freeing glyph color palette data */
+ FT_FREE( face->palette_data.palette_name_ids );
+ FT_FREE( face->palette_data.palette_flags );
+ FT_FREE( face->palette_data.palette_entry_name_ids );
+ FT_FREE( face->palette );
+
face->sfnt = NULL;
}
/* END */
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